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L9679P Datasheet(PDF) 231 Page - STMicroelectronics |
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L9679P Datasheet(HTML) 231 Page - STMicroelectronics |
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231 / 272 page  DocID029275 Rev 1 231/272 L9679P Electrical characteristics 271 Table 36. ERBoost regulator AC specifications No Symbol Parameter Conditions Min Typ Max Unit 1FSW_ERBST ERBOOST switching frequency - 1.8 1.882 2.0 MHz 2 TRISE_ERBSTSW_SLOW TFALL_ERBSTSW_SLOW ERBSTSW transition time 10% to 90% voltage on ERBSTSW VIN ≥ VINFASTSLOPE_H = 10.3 V Iload = 6 0mA SYS_CTL(ER_BST_V) = 1 Guaranteed by Design 15 - 35 ns 3 TRISE_ERBSTSW_FAST TFALL_ERBSTSW_FAST 10% to 90% voltage on ERBSTSW VIN = VINFASTSLOPE_L =9 V 5 - 15 ns 4TON_ERBST ERBOOST charge-up time CERBOOST = 2.2 μF Vin =12V, IO_ERBST= 5mA SYS_CTL(ER_BST_V) = 1 Measured from CS_G edge to VO_ERBST(min) 50 - 500 μs 5TSOFTST_IOC_ERBST ERBOOST over current threshold soft start time Not tested -5% 1024 +5% μs 6TFLT_VIN_ERBST_COMP Deglitch filter on VIN_ERBoost comparator -27 30 33 μs 7TFLT_TSD_ERBST Thermal shutdown filter time -- - 10 μs 8TSOFTST_ERBST ERBOOST Soft-start Time Design Info. Time from activation of ERBOOST when overcurrent is 40% of IOC_ERBST (IOC_ERBST_ERON) to instant when overcurrent is 100% of IOC_ERBST (IOC_ERBST_ERON) - - 1075 μs Table 37. ERBOOST Converter external components design info No Symbol Component Conditions Min Typ Max Unit 1LERBST Inductance - 8 10 12 μH 2 ESLERBST Inductance resistance - - - 0.1 Ω 3CBLK_ERBST Output bulk capacitance to ensure regulator stability Min cap value including derating factors 1 2.2 - μF 4 ESRCBLK_ERBST Bulk capacitor ESR - - 50 mΩ |
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